为什么第一个孩子是最聪明的？
<p>"<span word="Those">Those</span> <span word="born">born</span> <span word="earlier">earlier</span> <span word="perform">perform</span> <span word="better">better</span> <span word="in">in</span> <span word="school">school</span>"—<span word="and">and</span> <span word="according">according</span> <span word="to">to</span> <span word="a">a</span> <span word="new">new</span> <span word="study">study</span>, <span word="it">it</span>'<span word="s">s</span> <span word="because">because</span> <span word="of">of</span> <span word="the">the</span> <span word="parents">parents</span>.</p><p><span word="Moms">Moms</span> <span word="and">and</span> <span word="dads">dads</span> <span word="simply">simply</span> <span word="go">go</span> <span word="easy">easy</span> <span word="on">on</span> <span word="their">their</span> <span word="later">later</span>-<span word="born">born</span> <span word="kids">kids</span>, <span word="according">according</span> <span word="to">to</span> <span word="data">data</span> <span word="analyzed">analyzed</span> <span word="by">by</span> <span word="economists">economists</span> <span word="V">V</span>. <span word="Joseph">Joseph</span> <span word="Hotz">Hotz</span> <span word="and">and</span> <span word="Juan">Juan</span> <span word="Pantano">Pantano</span>, <span word="and">and</span> <span word="as">as</span> <span word="a">a</span> <span word="result">result</span>, <span word="first">first</span>-<span word="born">born</span> <span word="children">children</span> <span word="tend">tend</span> <span word="to">to</span> <span word="receive">receive</span> <span word="both">both</span> <span word="the">the</span> <span word="best">best</span> <span word="parenting">parenting</span> <span word="and">and</span> <span word="the">the</span> <span word="best">best</span> <span word="grades">grades</span>.</p><p><span word="The">The</span> <span word="first">first</span> <span word="thing">thing</span> <span word="to">to</span> <span word="say">say</span> <span word="about">about</span> <span word="a">a</span> <span word="study">study</span> <span word="like">like</span> <span word="this">this</span> <span word="is">is</span> <span word="that">that</span> <span word="lots">lots</span> <span word="of">of</span> <span word="readers">readers</span> <span word="will">will</span> <span word="reflexively">reflexively</span> <span word="disagree">disagree</span> <span word="with">with</span> <span word="the">the</span> <span word="assumption">assumption</span>. <span word="With">With</span> <span word="kids">kids</span>, <span word="as">as</span> <span word="with">with</span> <span word="anything">anything</span>, <span word="shouldn">shouldn</span>'<span word="t">t</span> <span word="practice">practice</span> <span word="make">make</span> <span word="perfect">perfect</span>? <span word="Don">Don</span>'<span word="t">t</span> <span word="parents">parents</span> <span word="get">get</span> <span word="richer">richer</span> <span word="into">into</span> <span word="their">their</span> 30<span word="s">s</span> <span word="and">and</span> 40<span word="s">s</span>, <span word="providing">providing</span> <span word="for">for</span> <span word="better">better</span> <span word="child">child</span>-<span word="rearing">rearing</span> <span word="resources">resources</span>? <span word="I">I</span>'<span word="m">m</span> <span word="a">a</span> <span word="first">first</span> <span word="child">child</span>, <span word="myself">myself</span>, <span word="well">well</span>-<span word="known">known</span> <span word="within">within</span> <span word="the">the</span> <span word="family">family</span> <span word="for">for</span> <span word="being">being</span> <span word="unorganized">unorganized</span>, <span word="forgetful">forgetful</span>, <span word="periodically">periodically</span> <span word="disheveled">disheveled</span>, <span word="and">and</span> <span word="persistently">persistently</span> <span word="caught">caught</span> <span word="day">day</span>-<span word="dreaming">dreaming</span> <span word="in">in</span> <span word="the">the</span> <span word="middle">middle</span> <span word="of">of</span> <span word="conversations">conversations</span>. <span word="For">For</span> <span word="this">this</span> <span word="reason">reason</span>, <span word="I">I</span>'<span word="ve">ve</span> <span word="put">put</span> <span word="stock">stock</span> <span word="in">in</span> <span word="what">what</span> <span word="you">you</span> <span word="might">might</span> <span word="call">call</span> <span word="the">the</span> <span word="First">First</span> <span word="Pancake">Pancake</span> <span word="Theory">Theory</span> <span word="of">of</span> <span word="Parenting">Parenting</span>. <span word="In">In</span> <span word="short">short</span>: <span word="First">First</span> <span word="pancakes">pancakes</span> <span word="tend">tend</span> <span word="to">to</span> <span word="come">come</span> <span word="out">out</span> <span word="a">a</span> <span word="little">little</span> <span word="funny">funny</span>, <span word="and">and</span>, <span word="well">well</span>, <span word="so">so</span> <span word="did">did</span> <span word="I">I</span>. <span word="And">And</span> <span word="so">so</span> <span word="do">do</span> <span word="many">many</span> <span word="first">first</span>-<span word="borns">borns</span>.</p><p><span word="But">But</span> <span word="international">international</span> <span word="surveys">surveys</span> <span word="of">of</span> <span word="birth">birth</span> <span word="orders">orders</span> <span word="and">and</span> <span word="behavior">behavior</span> (<span word="which">which</span> <span word="might">might</span> <span word="have">have</span> <span word="offered">offered</span> <span word="me">me</span> <span word="an">an</span> <span word="empirical">empirical</span> <span word="excuse">excuse</span> <span word="to">to</span> <span word="behave">behave</span> <span word="this">this</span> <span word="way">way</span>) <span word="aren">aren</span>'<span word="t">t</span> <span word="doing">doing</span> <span word="me">me</span> <span word="any">any</span> <span word="favors">favors</span>. <span word="First">First</span> <span word="borns">borns</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span>, <span word="it">it</span> <span word="turns">turns</span> <span word="out">out</span>, <span word="have">have</span> <span word="higher">higher</span> <span word="IQs">IQs</span>, <span word="perform">perform</span> <span word="better">better</span> <span word="in">in</span> <span word="school">school</span>, <span word="and">and</span> <span word="are">are</span> <span word="considered">considered</span> <span word="more">more</span> <span word="accomplished">accomplished</span> <span word="by">by</span> <span word="their">their</span> <span word="parents">parents</span>. <span word="Looking">Looking</span> <span word="at">at</span> <span word="parent">parent</span> <span word="evaluations">evaluations</span> <span word="of">of</span> <span word="children">children</span> <span word="from">from</span> <span word="the">the</span> <span word="National">National</span> <span word="Longitudinal">Longitudinal</span> <span word="Survey">Survey</span> <span word="of">of</span> <span word="Youth">Youth</span> <span word="in">in</span> 1979, <span word="the">the</span> <span word="researchers">researchers</span> <span word="found">found</span> <span word="that">that</span> <span word="mothers">mothers</span> <span word="are">are</span> <span word="much">much</span> <span word="more">more</span> <span word="likely">likely</span> <span word="to">to</span> <span word="see">see</span> <span word="their">their</span> <span word="first">first</span> <span word="children">children</span> <span word="as">as</span> <span word="high">high</span>-<span word="achievers">achievers</span>. <span word="They">They</span> <span word="regard">regard</span> <span word="their">their</span> <span word="subsequent">subsequent</span> <span word="children">children</span> <span word="as">as</span> <span word="considerably">considerably</span> <span word="more">more</span> <span word="average">average</span> <span word="in">in</span> <span word="their">their</span> <span word="class">class</span> (<span word="see">see</span> <span word="table">table</span> <span word="and">and</span> <span word="chart">chart</span> <span word="below">below</span>).</p>
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